Extended number to number

Question

Extended number to number

I would like to transform an extended number to normal int; example:

FunçãoParaConverter("trinta e dois")                        // retorna 32
FunçãoParaConverter("mil vinte e quatro")                   // retorna 1024
FunçãoParaConverter("mil trezentos e trinta e tres")        // retorna 1333
FunçãoParaConverter("sete mil setecentos e setenta e sete") // retorna 7777

11

c#string inteiros

Author: Vinicius Brasil, 2017-12-15

Source

1 answers

score 5 · Accepted Answer

Based on the examples listed in the question comments, I created the routine below to convert the number by extension to int.

Briefly, the routine works as follows: it breaks the text by extension into words and searches the dictionaries (NumDict and MilharDict) for the amount that will be counted for each word.

It is working straight but can be improved. For example: a text syntax check could be implemented to generate an error when the text was misspelled (ex: thirty-ten)

An example of the code running online in https://ideone.com/vWGJYQ (by @VirgilioNovic)

Dictionary<string,int> NumDict;
Dictionary<string,int> MilharDict;

private int ExtensoToInteiro(string extenso)
{           

    if (NumDict == null)
    {
        NumDict = new Dictionary<string,int>();
        MilharDict = new Dictionary<string,int>();

        NumDict.Add("zero",0);
        NumDict.Add("um",1);
        NumDict.Add("dois",2);
        NumDict.Add("três",3);
        NumDict.Add("quatro",4);
        NumDict.Add("cinco",5);
        NumDict.Add("seis",6);
        NumDict.Add("sete",7);
        NumDict.Add("oito",8);
        NumDict.Add("nove",9);

        NumDict.Add("dez",10);
        NumDict.Add("onze",11);
        NumDict.Add("doze",12);
        NumDict.Add("treze",13);
        NumDict.Add("quatorze",14);
        NumDict.Add("quinze",15);
        NumDict.Add("dezesseis",16);
        NumDict.Add("dezessete",17);
        NumDict.Add("dezoito",18);
        NumDict.Add("dezenove",19);

        NumDict.Add("vinte",20);
        NumDict.Add("trinta",30);
        NumDict.Add("quarenta",40);
        NumDict.Add("cinquenta",50);
        NumDict.Add("sessenta",60);
        NumDict.Add("setenta",70);
        NumDict.Add("oitenta",80);
        NumDict.Add("noventa",90);

        NumDict.Add("cem",100);
        NumDict.Add("cento",100); 
        NumDict.Add("duzentos",200);
        NumDict.Add("trezentos",300);
        NumDict.Add("quatrocentos",400);
        NumDict.Add("quinhentos",500);
        NumDict.Add("seiscentos",600);
        NumDict.Add("setecentos",700);
        NumDict.Add("oitocentos",800);
        NumDict.Add("novecentos",900);

        MilharDict.Add("mil",1000);
        MilharDict.Add("milhão",1000000);
        MilharDict.Add("milhões",1000000);
        MilharDict.Add("bilhão",1000000000);
        MilharDict.Add("bilhões",1000000000);
    }

    int resultado = 0;
    int grupoCorrente = 0;

    foreach (var word in extenso.Split(' '))
    {
        if (NumDict.ContainsKey(word))
        {
            grupoCorrente += NumDict[word];
        }
        else if (MilharDict.ContainsKey(word))
        {
            resultado += (grupoCorrente == 0 ? 1 : grupoCorrente) * MilharDict[word];
            grupoCorrente = 0;
        }               
    }

    resultado += grupoCorrente;

    return resultado;
}